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Chalcones and other constituents of Dorstenia prorepens and Dorstenia zenkeri
(Elsevier Science Ltd. www.elsevier.com/locate/phytochem, 2002)
The twigs of Dorstenia prorepens furnished the digeranylated chalcone, 5,30-(3,7-dimethyl-2,6-octadienyl)-3,4, 20,40-tetrahydroxychalcone
while Dorstenia zenkeri yielded the 30,40-(3-hydroxy-2,2-dimethyldihydropyrano)-4 ...
The theory of attenuated total reflection by surface polaritons on corrugated semi-infinite media
(Elsevier Science Ltd. www.elsevier.com/locate/physb, 2002-02)
The experimental techniques of attenuated total reflection and grating-coupling were originally employed separately
as probes for surface polaritons. However, as far back as the mid-1970s, some value was found in actually ...
Gravity evidence for a larger Limpopo Belt in southern Africa and geodynamic implications
(Royal Astronomical Society. http://www.wiley.com/bw/journal.asp?ref=0956-540X&site=1, 2002)
The Limpopo Belt of southern Africa is a Neoarchean orogenic belt located between two older Archean provinces, the Zimbabwe craton to the north and the Kaapvaal craton to the south. Previous studies considered the Limpopo ...
Urban water scarcity management: civic vs. state response in Bulawayo
(Pergamon, www.elsevier.com/locate/habitatint, 2002)
In most sub-Sahara African cities, rapid urbanization has placed a heavy burden on available human,
financial and socioeconomic resources. The problem has been compounded by the intricate and interactive
effects of rapid ...
Energy sector policies in Botswana and their implications for global climate change
(Kluwer Academic Publishers, http://www.springerlink.com/content/102895/, 2002)
Like most African countries, Botswana contributes almost insignificantly to global greenhouse emissions (GHGs). In this context, some have argued that energy policy and legislative measures to regulate emissions in Botswana ...
Localized wood resource depletion in Botswana: Towards a demographic, institutional and cosmovisional explanation
(Taylor & Francis Ltd, http://www.tandf.co.uk/journals/cepe, 2002)
In sub-Saharan Africa, communal land resource utilization and management has reflected changes in sociocultural belief systems, population dynamics, and
modes of societal administration and regulation. This paper, based ...
Antimicrobial Flavonoids from Bolusanthus speciosus
(Georg Thieme Verlag, https://www.thieme.com/, 2002)
A new isoflavanone namely 3,5,7,2′,4′-pentahydroxy-8,3′-di(γ,γ-dimethylallyl)isoflavanone (bolusanthin II) and four new pterocarpans identified as 3-hydroxy-6′,6′-dimethylpyrano[2′,3′:1,2] [6aR,11aR]-8,9-methylenedioxypterocarpan ...
Erythrinaline Alkaloids and Antimicrobial Flavonoids from Erythrina latissima
(Georg Thieme Verlag, https://www.thieme.com/books-main/biochemistry/product/3494-planta-medica, 2002)
The seed pods of Erythrina latissima yielded erysotrine, erysodine, syringaresinol, vanillic acid, a new erythrina alkaloid, (+)-10,11-dioxoerysotrine, which was lethal to brine shrimp and 2-(5′-hydroxy-3′-methoxy ...
The P wavespeed structure below and around the Kaapvaal craton to depths of 800 km, from traveltimes and waveforms of local and regional earthquakes and mining-induced tremors
(Oxford University Press, https://academic.oup.com/gji, 2002-10-01)
An average P-wavespeed model from the surface to depths of 800 km was derived for southern Africa using traveltimes and waveforms from earthquakes recorded at stations of the Kaapvaal and South African National networks. ...